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Group Chat

1. Without using the STAT app, find the:� a. mode b. mean

2. Without using the STAT app, � state the modal class.��3. Using the STAT app, find the:� a. mean b. standard deviation

4. Without using the STAT app:� a. State the range.� b. Calculate the mean.� c. Find the interquartile range.

1, 2, 4, 5, 7, 12, 15, 18, 23

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1. Without using the STAT app, find the:� a. mode b. mean

2. Without using the STAT app:� c. state the modal class��4. Using the STAT app, find the:� d. mean e. standard deviation

mode: 1

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1, 2, 4, 5, 7, 12, 15, 18, 23

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Pair Task

Download and open�this presentation.��Discuss and work �closely with �your partner�as you proceed.

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🡪 Find the range and IQR without using the STAT app.

🡪 Use your GDC to find the mean and standard deviation.

�🡪 Compare the mean and median. � Which, do you believe, is a more � appropriate measure of central tendency?

🡪 Compare the range, IQR, and standard deviation.� Which, do you believe, is a more � appropriate measure of dispersion?

�

Consider the following scores earned on a Biology examination:��18, 22, 26, 39, 45, 46, 46, 52, 54, 58, 62, 62, 62, 62, 67, 70, 71, 75, 78, 82, 89, 91, 95, 98

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Often, a full population about which you want to gather and statistically analyze data is too big. Therefore, a sample can be taken from the full population.��Then, the sample can be used as a representation of the whole population and statistics gained from the sample are considered to represent the full group.

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Non-Biased Sampling Techniques

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Let’s investigate further with �the Health vs. Wealth Data …

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Open the �Country Data Set in Google Sheets.

Complete Steps 1, 2, 3, 4, and 5 �in the Google Sheet tabs…

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Do you understand Quota Sampling ?

quota

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Practice Problems

Complete key �problems from �our Practice�Assignment.�

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